diff --git a/tools/tools/ath/athaggrstats/main.c b/tools/tools/ath/athaggrstats/main.c
index 95e7917455ba..6a0de98b0069 100644
--- a/tools/tools/ath/athaggrstats/main.c
+++ b/tools/tools/ath/athaggrstats/main.c
@@ -89,7 +89,7 @@ main(int argc, char *argv[])
 
 	ifname = getenv("ATH");
 	if (ifname == NULL)
-		ifname = "ath0";
+		ifname = ATH_DEFAULT;
 	wf = athaggrstats_new(ifname, getfmt("default"));
 	while ((c = getopt(argc, argv, "bi:lo:z")) != -1) {
 		switch (c) {
diff --git a/tools/tools/ath/athdebug/athdebug.c b/tools/tools/ath/athdebug/athdebug.c
index bcdbcc8aae47..b28f0432f435 100644
--- a/tools/tools/ath/athdebug/athdebug.c
+++ b/tools/tools/ath/athdebug/athdebug.c
@@ -31,7 +31,7 @@
 
 /*
  * athdebug [-i interface] flags
- * (default interface is ath0).
+ * (default interface is wlan0).
  */
 
 #include <sys/param.h>
@@ -156,7 +156,7 @@ main(int argc, char *argv[])
 
 	ifname = getenv("ATH");
 	if (ifname == NULL)
-		ifname = "ath0";
+		ifname = ATH_DEFAULT;
 	progname = argv[0];
 	if (argc > 1) {
 		if (strcmp(argv[1], "-i") == 0) {
diff --git a/tools/tools/ath/athradar/athradar.c b/tools/tools/ath/athradar/athradar.c
index f40e1bd09be5..69f441658a85 100644
--- a/tools/tools/ath/athradar/athradar.c
+++ b/tools/tools/ath/athradar/athradar.c
@@ -30,10 +30,6 @@
 #include "ah.h"
 #include "ah_internal.h"
 
-#ifndef	ATH_DEFAULT
-#define	ATH_DEFAULT	"ath0"
-#endif
-
 #include <getopt.h>
 #include <errno.h>
 #include <err.h>
diff --git a/tools/tools/ath/athratestats/main.c b/tools/tools/ath/athratestats/main.c
index 3881e8543be0..b3f85f758577 100644
--- a/tools/tools/ath/athratestats/main.c
+++ b/tools/tools/ath/athratestats/main.c
@@ -310,7 +310,7 @@ main(int argc, char *argv[])
 
 	ifname = getenv("ATH");
 	if (ifname == NULL)
-		ifname = "ath0";
+		ifname = ATH_DEFAULT;
 
 	while ((c = getopt(argc, argv, "ahi:m:s:")) != -1) {
 		switch (c) {
diff --git a/tools/tools/ath/athspectral/athspectral.c b/tools/tools/ath/athspectral/athspectral.c
index 1ec908562aba..91045d022443 100644
--- a/tools/tools/ath/athspectral/athspectral.c
+++ b/tools/tools/ath/athspectral/athspectral.c
@@ -30,10 +30,6 @@
 #include "ah.h"
 #include "ah_internal.h"
 
-#ifndef	ATH_DEFAULT
-#define	ATH_DEFAULT	"ath0"
-#endif
-
 #include <getopt.h>
 #include <errno.h>
 #include <err.h>
diff --git a/tools/tools/ath/athstats/main.c b/tools/tools/ath/athstats/main.c
index bf0323d8715c..29e86365c83b 100644
--- a/tools/tools/ath/athstats/main.c
+++ b/tools/tools/ath/athstats/main.c
@@ -94,7 +94,7 @@ main(int argc, char *argv[])
 
 	ifname = getenv("ATH");
 	if (ifname == NULL)
-		ifname = "ath0";
+		ifname = ATH_DEFAULT;
 	wf = athstats_new(ifname, getfmt("default"));
 	while ((c = getopt(argc, argv, "bi:lo:z")) != -1) {
 		switch (c) {